... ; mature GPRS/CDMA network communication technology, one-key switch between GPRS/CDMA/UHFBased on regular RTK applications, completely ... of 120 hours continuous static data collection.USB communication port, plug and play; USB device static data download ... , Receiver Component2,Internal UHF Radio Component3,GSM Module4,Port Component5,Panel Key-Press and Lamp6,Positioning Specifications/Accurancy ...